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Finding the Fourth Proportional to 138.43, 191.06 and 94.83

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Solution

The fourth proportional to 138.43, 191.06 and 94.83 is: 130.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.43 : 191.06 = 94.83 : x
  2. Step 2: Convert to fraction form
    138.43/191.06 = 94.83/x
  3. Step 3: Cross multiply
    138.43x = 191.06 × 94.83
  4. Step 4: Simplify right side
    138.43x = 18,118.22
  5. Step 5: Solve for x
    x = 18,118.22/138.43
  6. Step 6: Final answer
    x = 130.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.